Where does “ęr” come from?

ęr (Old Norse) comes from Proto-Germanic arwaz, from Proto-Indo-European Herwos, from Proto-Indo-European h₂er- — to fit, to fix, to put together.

Ancestry of “ęr”, step by step

StepLanguageWordMeaning
1Proto-Germanicarwazready, fast; scar
2Proto-Indo-EuropeanHerwos—
3Proto-Indo-Europeanh₂er-to fit, to fix, to put together

Words derived from “ęr”

Every word from Proto-Indo-European h₂er- →Every word from Proto-Indo-European Herwos →Every word from Proto-Germanic arwaz →